Computer Networks Part-1

1. Error detection at a data link level is achieved by   1) bit stuffing 2) cyclic redundancy codes 3) Hamming codes 4) equalization 2. When the computer provides the manager with a multiple choice of possible answers, the prompting technique is   1) question and answer 2) form filling 3) open-ended question 4) menu selection 3. Which data communication method is used to transmit the data over a serial communication link?   1) simplex 2) half-duplex 3) full-duplex 4) None of above 4. What is the minimum number of wires needed to send data over a serial communication link layer?   1) 1 2) 2 3) 4 4) 6 5. Most data communications involving telegraph lines use:   1) simplex lines 2) wideband channel 3) narrowband channel 4) dialed service